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    It usually takes several degrees of retard to...

    It usually takes several degrees of retard to stop knock once it begins, and this reduces power. Additionally once knock begins there is residual heat in the chamber and piston top which takes time...
  2. Thread: Hi again

    by 1project2many
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    Hello, Welcome to the forum. Thank you for...

    Hello,

    Welcome to the forum. Thank you for the compliment. Member contributions are what really makes this useful so please feel free to post photos, stories, or even questions.
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    If you used a hex editor to swap segments then...

    If you used a hex editor to swap segments then the checksums will be incorrect. If you take the modified file and swap the segments back, the checksum should again be correct. This twice modified...
  4. '89 File works on '88. 9th injector not...

    '89 File works on '88. 9th injector not controlled by ecm so disable by disconnecting temperature switch. You will need to "scan" vehicle as 89 once newer calibration is installed.
  5. Except for acceleration enrichment, the fuel...

    Except for acceleration enrichment, the fuel parameters are based on correct numbers in the VE tables. PE values tell the computer what AFR to deliver, and the delivered AFR should be close to the...
  6. It really seems like pinpointing the system that...

    It really seems like pinpointing the system that has a problem should be easy.

    When an engine stalls and won't restart my approach as a tech is usually fairly simple. Remove fuel pump fuse,...
  7. This is the same issue that I had with a set of...

    This is the same issue that I had with a set of Keihin marine injectors years ago. I thought the solution would be simple because I ran the same injectors in my Chevelle with MEFI controlling it,...
  8. These do seem tough to find specs for. This...

    These do seem tough to find specs for. This document lists voltage corrections by injector series. IWP are top-end race injectors. ...
  9. You really want to follow a methodical test ->...

    You really want to follow a methodical test -> eliminate process to solve this. Simply replacing the intake gaskets is not the way to go imo.

    I think the bucket test isn't a bad one but as...
  10. Is this helpful?...

    Is this helpful?
    https://www.youtube.com/watch?edufilter=NULL&v=oGeMK6LvQck

    Edit: Lotsa "not nice" forum reviews on J&M.
  11. Ok... If you do need additional diagrams let me...

    Ok... If you do need additional diagrams let me know.
  12. What type of vehicle is the '92 engine from...

    What type of vehicle is the '92 engine from (Pickup, Suburban. Chassis Cab)?

    Is the 91 Suburban round c/k style or square r/v style?
  13. Unfortunately the bulkhead connector wiring...

    Unfortunately the bulkhead connector wiring diagrams are not part of the regular ecm wiring diagrams. They can be tough to locate. If you haven't found any by tomorrow I will try to locate some...
  14. I feel there is more to this story. If no one...

    I feel there is more to this story. If no one wants to work on the car it's generally not the car's fault. From perfect to undiagnosably messed up in a short time is atypical. Good mechanic...
  15. The sensor appears to produce a 12V square wave...

    The sensor appears to produce a 12V square wave signal. I'm having trouble confirming but one forum discussion mentions eight pulses per tire revolution. If so, calculating the pulses per mile is a...
  16. Beginning at $FFC0 to the top of the chip ($FFFF)...

    Beginning at $FFC0 to the top of the chip ($FFFF) there are addresses for the ecm to use when various events occur. If one of these addresses is even a bit off you can have very unexpected results. ...
  17. If you can get information about the Porsche...

    If you can get information about the Porsche signal it may be easier to figure out what's going on. The signal type (a/c or d/c pulse) and the number of pulses per mile or per driveshaft revolution...
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    I have corrected the offending messages in this...

    I have corrected the offending messages in this thread.
  19. Hmmm... has it ever worked for you? Is it...

    Hmmm... has it ever worked for you? Is it possible the speed sensor was disconnected for the dyno run?
  20. Sticky: I'm glad you've figured a way around the issue. ...

    I'm glad you've figured a way around the issue. When you "Save As" the browser suggests a filename. You can change the name of the file by typing in the name manually.

    Unfortunately I can't get...
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    Hello, Welcome to the forum. Once upon a...

    Hello,

    Welcome to the forum.

    Once upon a time it wasn't uncommon to replace the 1227165 ecm from the 86-89 cars with the 1227730 ecm found in 91-92 Camaros and Firebirds. The 1227730...
  22. Vehicle speed is generally one of the values...

    Vehicle speed is generally one of the values which can trigger the ecm to cut fuel. If the vehicle speed is reported incorrectly then you may need to increase the maximum speed allowed in the...
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    Hello, I have nothing with Windows 10 so...

    Hello,

    I have nothing with Windows 10 so unable to reproduce. Have you looked for solutions on any other forums? One says to delete msvcp100.dll from C:\[user]\My Documents\Tuner Pro...
  24. Sticky: I believe that someone said IE does that if...

    I believe that someone said IE does that if you're not using "compatibility mode." You can right click, "save as," then type in the file name you want.
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    Was that engine supported by DHP?

    Was that engine supported by DHP?
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